Regioselective synthesis of functionalized 1,2,3-triazoles via oxidative [3+2]-cycloaddition using Zn(OAc)2 - tBuOOH or ZnO nanoparticle as catalyst system in aqueous medium
The regioselective synthesis of functionalized pyrazole˗1,2,3-triazoles is reported viaoxidative [3 + 2]-cycloaddition reactions of azides with β-nitrostyrenes and chalcone derivatives using Zn(OAc)2 - tBuOOH or ZnO nanoparticles as catalyst system in aqueous medium. The catalyst dependent product selectivity was observed with β-nitrostyrenes to give the triazoles with and without -NO2 group Zn(OAc)2
Synthesis of functionalized 1,2,3-triazoles using Bi<sub>2</sub>WO<sub>6</sub> nanoparticles as efficient and reusable heterogeneous catalyst in aqueous medium
The regioselective synthesis of functionalized triazoles is achieved using a combination of Bi2WO6 nanoparticles (10 mol%) and click conditions from β-nitrostyrenes, phenylacetylene and chalcones with azides.
A tunable route to oxidative and eliminative [3+2] cycloadditions of organic azides with nitroolefins: CuO nanoparticles catalyzed synthesis of 1,2,3-triazoles under solvent-free condition
作者:D. Gangaprasad、J. Paul Raj、T. Kiranmye、R. Sasikala、K. Karthikeyan、S. Kutti Rani、J. Elangovan
DOI:10.1016/j.tetlet.2016.06.004
日期:2016.7
A regioselective and tunable synthesis of 1,5-disubstituted 1,2,3-triazloles from oxidative and eliminative [3+2] cycloadditions of nitroolefins and organic azides under solvent-free condition in the presence and absence of commercially available CuO nanoparticle catalyst is described. In the presence of the catalyst under solvent-free condition, nitro group is retained in the product while it gets eliminated in the absence of the catalyst. (C) 2016 Elsevier Ltd. All rights reserved.
Ce(OTf)<sub>3</sub>-Catalyzed [3 + 2] Cycloaddition of Azides with Nitroolefins: Regioselective Synthesis of 1,5-Disubstituted 1,2,3-Triazoles
the presence of a catalytic amount of Ce(OTf)3, both benzyl and phenyl azides react with a broad range of aryl nitroolefins containing a range of functionalities selectively producing 1,5-disubstituted1,2,3-triazoles in good to excellent yields.